Reciprocating pump



Feb? L2 192A;o

m5 ATTORNEY Festa, ieee..

wir as hdd, :l

FRNK J'. MILLER, 0F WICHITA FALLS, T

',assrenoa BY Mnsrm ASSIGNMENTS, To

L. E. TROUT, OF OKLAHOMA CITY, OKLAHO.

EECEPROCATING .PUMR

Application le April 6,

To all whom t may concern:

Beit known that l, FRANK J. "w 1 a citizen of the United States, residing at Wichita Falls, Wichita County, rlexas, have invented a certain new and useful improvement in Reciprocating Pumps, of which the following is a full, clear, and exact description, such as will enable others skilled in the art to which it appertains to make and use the same.

My invention relates to pumps such as are employed in pump-ing deep wells for oil or water.

The object of my invention is to provide a reciprocating pump of the deep well type wherein the ordinary working barrel usually employed may be dispensed with. Another object isto provide a plunger which will telescope over the standing valve in the bottomof the well in such manner as to provide suiicient suction without the use of the ordinary packing means.

Another object is to provide a plunger of the type described whereby the outer telescoping portion thereof may be detachably secured to the body of the plunger in such manner that the plunger itself may be removed from the well without the necessity of also removing the telescoping sleeve.

Referring to the drawing herewith, I have shown a central longitudinal section through a pump tubing and standing valve using my improved plunger employed in connection therewith. ln carr ing out my invention l preferably provlde a pump barrel 1 wherein the plunger lmay reciprocate, which pump barrel is of larger diameter than the main tubing'2 extending from the surface down to the bottom of the well. The tubing 2 is connected to the larger pump barrel 1 by means of a swedged couplin or nipple 3, the tubing and pump barre both being threaded externally for attachment withinthe said coupling.

At the lower end of the pump barrel 1 is a special coupling 4 of the usual construction by means of which the pump barrel isconnected to the strainer or perforated pipe 5 below the standlng valve. The central portion of the coupling is of comparatively small internal diameter and provides a re" cess tapered atG to rovide a seat for a standing valve 7 which may be wedged downwardly into said seat foroperation in 1923. Serial No. 630,222.

the usual manner. standing valve 7 is provided with a valve seat 9 and ball valve 10 secured in place by a cage 11. The upper endof the cage is provided with a threadedsocket 12 whereby a setting tool may be employed to force the valve-and its housing downwardlyinto the coupling.

The upper end ofthe valve chamber within the coupling 4 is enlarged and threaded at 13 to receive the lower end of an upright tube 14. This tube extends upwardly within the pump barrel for somewhat over half the length of the said barrel. llt is provided with smooth outer and inner surfaces to provide a close sliding contact with the plunger which is adaptedto telescope over said tube.

The plunger used in connection with my pump has a head 16,-threaded on its outer surface for connection to a valve cage 17, said cage being formed to clamp upon the upper end of the head 16 a valve seat 18 to accommodate a ball valve 19. The upper end of the said cage is connected to a sucker rod 20 by means of which the plunger may be reciprocated. The lower end of the plunger is reduced in diameter and has thereon a series of cups 21 spaced apart by means of spacing collars 22. These packing cups are of exible materialA and are directed outwardly in the usual manner.A The lower end of the head of the plunger The upper end of the is threaded on its outer surface for attachthe sleeve is connected to a nipple 24 which is of large internal diameter adjacent the upper end, to receive the head of the plunger. The inner walls are beveled inwardly at 25 and thickened to make a close fit with the packing cups 21 upon the plunger. The

lower end of the nipple24 is reduced in diameter and threaded at 26 for attachment to the telescoping sleeve 27 which fits slidably over the outer surface of the foot valve tube 14. The inner sleeve 23 upon the plunger i Messes is perforated at 28 to allow escape of uid from within the chamber 29 formed between the two telescoping sleeves upon the plunger during the operation of the pump. In installing this device the pump barrel 1 and foot valve and coupling,together with the perforated pipe, are secured together with the upright tube 14 thereon in the manner shown. The nipple 24, connected with the plunger is then placed within the pump barrel, telescoping down over the tube 14. rl`he tubing then is connected to the pump` barrel by means of the coupling 3 and the device is introduced into the well ready for operation. The plunger is of the proper external diameter at its largest point to fit slidably within the tubing and is introduced downwardly into the pump barrel. The lower end comprising the tube 23 and the packing cups 21 will fit closely within the lower portion of the nipple 24 and will make a tight wedging lit therewith. When the lower end of the valve cage 17 comes in contact with the beveled portion 25 of the nipple 24 the plunger will stop and the device will be ready for reciprocation. The tight fit between the plunger and the outer sleeve connected with the plunger will be suiiicient to cause the two'to reclprocate together in operation, and it will be noted that on the upward stroke of the plunger the ti ht fit between the -inner and outer sleeves o the plun er telescopin overvthe standing valve tu will be su cient to preserve the usual suction. This is especially true where oil fills the space between the sliding tubes. The oil will be drawn upwardly past the standing valve, fillin the inner chamber within the tube 14. n the downward stroke this Huid will be forced upwardly past the valve 19, into the tubing, toward the surface. The small opening 28 will prevent the formation of `a vacuum in the chamber 29 and assist in the easy operation of the plunger.

When it is desired to withdraw the plun er, due to any cause, the sucker rod will e pulled upwardly with some force, bringing the upper end of the nipple 24 in Contact with the shoulder provided at 30 on thelower face of the coupling 3. This will jar vthe outer nipple and sleeve loose from the body of the plunger, allowing the said plun r to be withdrawn, leavin the outer barre in the well. When the Iunger has been repaired either as to the va ve or to the culis 21, it may be again introduced into the we and will be wedged into tight contact with the outer sleeve in the manner previously described. f

A pump of this type will have many obvious advantages in that no working barrel will be needed, and a suction means is provlded wherein nopacking cups of the ordinary type are necessary for maintaining the.I

contact between the standing valve and the plunger. Sand will not readily work in between the telescoping parts and little wear will occui` under ordinary conditions of operation, making it possible to operate the pump 'successfully for long periods of time.

Having` thus described my invention, what I claim as new and desire to protect by Letters Patent is:

1. In apump, a tubing, a pump barrel thereon of larger diameter than said tubing, a standing valve secured to the lower end of said pump barrel, a stationary tube projecting upwardly from said standing valve, a plunger, a tubeon said plunger telescoping within said stationary tube and a tube of lar er diameter secured frictionally to said pIunger and adapted to telescope over said stationary tube. p

2. In a pump, a tubing, a pum barrel thereon of larger diameter than sai tubing a standing valve secured to the lower end oi said pump barrel, a stationary tube projecting upwardly from said standing valve, a plunger adapted to pass through said tubing, an outer tube in said pump barrel, said outer tube being of smaller internal diameter than said tubing, said plunger adapted to be wedged frictionally within said outer tube and said outer tube being adapted `to telescope closely over said stationary tube.

3. In a pump, a tubing, a pump barrel thereon of larger' diameter than .said tubing, a foot valve on said tubin a stationary tube surrounding said stan ing valve and projecting upwardly therefrom, a plunger adapted to slidably tit said tubing, an outer plunger tube .into which said plunger is formed to fit, cups on said pluner maintaining a tight frictional hold on said outer tube, and an inner tube on said to telescope within said stationary tube.

4. In a pump, a tubing, a pum barrel therein of lar er diameter than sai tubing, a standing va ve, a stationary tube projecting upwardly from said standing valve, a plunger, an outer tube frictiona ly fitting about said plunger and to telescope over said stationary tube, and means on said tubing to retain said outer tube within the pum barrel.

5. n a pump, a plunger, a head, a reduced extension atthe lower end thereof, packing cups thereon, a tube secured to the lower end of said extension, an outer tube into which said plunger and packing cups fit tightly whereby said outer tube may reciprocate with said plunger, and a stationary tube on which the tubes on said plunger may slidably lit.

6. In a pump a pump barrel, a plunger, a head, packing cupsbelow said head, a tube below said cups, an outer tube frictionally engaged over said cups, a stationary tube in lunger adapted .the lower end of said pump barrel, said tube l@ formed to fit slidably between the tubes on ably on said stationary tube, means to mainsaid plunger and a communicating passage tain a fluid-tight frictional fit between said 10 from above said stationary tube to the inside outer tube and said plunger, and means on of the plunger. said pump barrel to prevent withdrawal of 5 7. n a pump, a pump barrel, a plunger said outer tube with said plunger.

out of contact with said barrel, a stationary 1n testimony whereof, I hereunto aix my tube inthe lower end of said barrel, inner signature, this 29th day of March AD. 1923. and outer tubes on said plunger fitting slid- FRANK J. MILLER. 

